#
# import uuid
# flag1=uuid.uuid4()
# flag="flag{%s}"%flag1
# print(flag)
# a = 7
# b = 22
#
# c=''
# for j in flag:
#     if ord(j)>=ord("a") and ord(j)<=ord("z"):
#         cha=ord(j)-ord('a')
#         c+=chr((a * cha+ b) % 26+ord('a'))
#         print(c)
#     else:
#         c+=j
# print(c)


c="fvwm{9fkk07w2-w249-4kk1-w698-3fy6117f5rr6}"
#coding:utf-8
import libnum
a = 7
b = 22
#解密方式
e=libnum.invmod(7,26)
flag=''
for i in c:
    if ord(i) >= ord("a") and ord(i) <= ord("z"):
        cha=ord(i)-ord('a')
        flag+=chr((e*(cha-22)%26)+97)
    else:
        flag+=i
print(flag)